/*
 * Copyright (C) 2007 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.sa.xrace.client;

import android.graphics.Camera;
import android.graphics.Matrix;
import android.view.animation.Animation;
import android.view.animation.Transformation;

/**
 * @author jlin
 * @version $Id: Rotate3dAnimation.java,v 1.1 2008-11-17 07:32:26 cpan Exp $
 */
/**
 * An animation that rotates the view on the Y axis between two specified
 * angles. This animation also adds a translation on the Z axis (depth) to
 * improve the effect.
 */
public class Rotate3dAnimation extends Animation {

	public final float mFromDegrees;
	public final float mToDegrees;
	public final float mCenterX;
	public final float mCenterY;
	public final float mDepthZ;
	public final boolean mReverse;
	public Camera mCamera;
	public boolean misTurn = false;

	/**
	 * Creates a new 3D rotation on the Y axis. The rotation is defined by its
	 * start angle and its end angle. Both angles are in degrees. The rotation
	 * is performed around a center point on the 2D space, definied by a pair of
	 * X and Y coordinates, called centerX and centerY. When the animation
	 * starts, a translation on the Z axis (depth) is performed. The length of
	 * the translation can be specified, as well as whether the translation
	 * should be reversed in time.
	 * 
	 * @param fromDegrees
	 *            the start angle of the 3D rotation
	 * @param toDegrees
	 *            the end angle of the 3D rotation
	 * @param centerX
	 *            the X center of the 3D rotation
	 * @param centerY
	 *            the Y center of the 3D rotation
	 * @param reverse
	 *            true if the translation should be reversed, false otherwise
	 */
	public Rotate3dAnimation(float fromDegrees, float toDegrees, float centerX,
			float centerY, float depthZ, boolean reverse, boolean isTurn) {
		mFromDegrees = fromDegrees;
		mToDegrees = toDegrees;
		mCenterX = centerX;
		mCenterY = centerY;
		mDepthZ = depthZ;
		mReverse = reverse;
		misTurn = isTurn;
	}

	public void initialize(int width, int height, int parentWidth,
			int parentHeight) {
		super.initialize(width, height, parentWidth, parentHeight);
		mCamera = new Camera();
	}

/**
 * @see android.view.animation.Animation#applyTransformation(float, android.view.animation.Transformation)
 */
	protected void applyTransformation(float interpolatedTime, Transformation t) {
		
		final float fromDegrees = mFromDegrees;
		float degrees = mToDegrees - fromDegrees;
		final Camera camera = mCamera;
		camera.save();
		camera.rotateZ(degrees);
		camera.restore();

	}
}
